<template>
    <div>
        <el-form ref="form" :model="form" :rules="rules" style="margin-top: 6px;" size="small" label-width="90px">
            <el-form-item label="商品名称" prop="subject">
                <el-input v-model="form.subject" style="width: 35%" />
            </el-form-item>
            <el-form-item label="商品价格" prop="totalAmount">
                <el-input v-model="form.totalAmount" style="width: 35%" />
                <span style="color: #C0C0C0;margin-left: 10px;">测试允许区间(0,5000]</span>
            </el-form-item>
            <el-form-item label="商品描述" prop="body">
                <el-input v-model="form.body" style="width: 35%" rows="8" type="textarea" />
            </el-form-item>
            <el-form-item label="">
                <el-button :loading="loading" size="medium" type="primary" @click="doSubmit">去支付</el-button>
            </el-form-item>
        </el-form>
    </div>
</template>

<script>
import {toAliPay} from '@/api/tools/alipay';

export default {
    data() {
        return {
            url: '',
            // 新窗口的引用
            newWin: null,
            loading: false, form: {subject: '', totalAmount: '', body: ''},
            rules: {
                subject: [
                    {required: true, message: '商品名称不能为空', trigger: 'blur'}
                ],
                totalAmount: [
                    {required: true, message: '商品价格不能为空', trigger: 'blur'}
                ],
                body: [
                    {required: true, message: '商品描述不能为空', trigger: 'blur'}
                ]
            }
        };
    },
    watch: {
        url(newVal, oldVal) {
            if (newVal && this.newWin) {
                this.newWin.sessionStorage.clear();
                this.newWin.location.href = newVal;
                // 重定向后把url和newWin重置
                this.url = '';
                this.newWin = null;
            }
        }
    },
    methods: {
        doSubmit() {
            this.$refs['form'].validate((valid) => {
                if (valid) {
                    this.loading = true;
                    // 先打开一个空的新窗口，再请求
                    this.newWin = window.open();
                    let url = '';
                    if (/(Android)/i.test(navigator.userAgent)) { // 判断是否为Android手机
                        url = 'aliPay/toPayAsWeb';
                    } else if (/(iPhone|iPad|iPod|iOS)/i.test(navigator.userAgent)) { // 判断是否为苹果手机
                        url = 'aliPay/toPayAsWeb';
                    } else {
                        url = 'aliPay/toPayAsPC';
                    }
                    toAliPay(url, this.form).then(res => {
                        this.loading = false;
                        this.url = res;
                    }).catch(err => {
                        this.loading = false;
                        console.log(err.response.data.message);
                    });
                } else {
                    return false;
                }
            });
        }
    }
};
</script>

<style scoped>
</style>
